The Washer,keyway, cataloged under National Stock Number 5310-00-916-2189, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Army, United States Department of the Dba Watervliet Arsenal Div Business Development. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-916-2189 |
| Primary Part Number | 7986521 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Army, United States Department of the Dba Watervliet Arsenal Div Business Development |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| External Keyway Width | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Heat Treatment | QUENCHED AND TEMPERED |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| Outside Diameter | 1.115 INCHES MINIMUM AND 1.120 INCHES MAXIMUM IN |
| Material Thickness | 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.730 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| External Keyway Length | 0.085 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7986521 PRIMARY | Army, United States Department of the Dba Watervliet Arsenal Div Business Development (USA) |
NSN 5310-00-916-2189 is a Washer,keyway, manufactured by Army, United States Department of the Dba Watervliet Arsenal Div Business Development, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-916-2189 has 1 manufacturer part number on file: 7986521 (Army, United States Department of the Dba Watervliet Arsenal Div Business Development).
Key specifications for 7986521: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; External Keyway Width: 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN; Heat Treatment: QUENCHED AND TEMPERED. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.